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Finding the Fourth Proportional to 512,312.20, 767,489.10 and 275,576.20

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Solution

The fourth proportional to 512,312.20, 767,489.10 and 275,576.20 is: 412,837.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,312.20 : 767,489.10 = 275,576.20 : x
  2. Step 2: Convert to fraction form
    512,312.20/767,489.10 = 275,576.20/x
  3. Step 3: Cross multiply
    512,312.20x = 767,489.10 × 275,576.20
  4. Step 4: Simplify right side
    512,312.20x = 211,501,729,719.42
  5. Step 5: Solve for x
    x = 211,501,729,719.42/512,312.20
  6. Step 6: Final answer
    x = 412,837.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.